- 30 CSS Selectors you must memorize
https://code.tutsplus.com/tutorials/the-30-css-selectors-you-must-memorize--net-16048
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If two selectors apply to the same element, the one with higher specificity wins
(2005) https://stuffandnonsense.co.uk/archives/css_specificity_wars.html
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https://www.smashingmagazine.com/2010/04/css-specificity-and-inheritance/
- Gallery of programmable CSS Animations: http://animista.net/
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You can use CSS for that